ISPM 27 27 ANNEX 9 ENG DP 9: Genus Anastrepha Schiner INTERNATIONAL STANDARD FOR PHYTOSANITARY MEASURES PHYTOSANITARY FOR STANDARD INTERNATIONAL DIAGNOSTIC PROTOCOLS Produced by the Secretariat of the International Plant Protection Convention (IPPC) This page is intentionally left blank This diagnostic protocol was adopted by the Standards Committee on behalf of the Commission on Phytosanitary Measures in August 2015. The annex is a prescriptive part of ISPM 27. ISPM 27 Diagnostic protocols for regulated pests DP 9: Genus Anastrepha Schiner Adopted 2015; published 2016 CONTENTS 1. Pest Information ............................................................................................................................... 2 2. Taxonomic Information .................................................................................................................... 3 3. Detection ........................................................................................................................................... 4 3.1 Inspection of fruits. ........................................................................................................... 4 3.2 Inspection of traps. ............................................................................................................ 4 4. Identification ..................................................................................................................................... 4 4.1 Preparation of adults for identification .............................................................................. 5 4.1.1 Rearing larvae to obtain adults .......................................................................................... 5 4.1.2 Preparation of adults for microscopic examination ........................................................... 5 4.2 Preparation of larvae for identification ............................................................................. 6 4.2.1 Handling the biological sample ......................................................................................... 6 4.2.2 Preparation of larvae for microscopic examination .......................................................... 6 4.3 Morphological identification of adults .............................................................................. 7 4.3.1 Identification of the genus Anastrepha Loew ................................................................... 7 4.3.2 Key to adults of major economically important species of the genus Anastrepha ........... 7 4.4 Morphological identification of third instar larvae ........................................................... 8 4.4.1 Key to third instar larvae of major economically important genera of Tephritidae in the Americas ...................................................................................................................... 8 4.4.2 Key to third instar larvae of major economically important species of the genus Anastrepha ........................................................................................................................ 9 5. Records ........................................................................................................................................... 15 6. Contact Points for Further Information .......................................................................................... 15 7. Acknowledgements ........................................................................................................................ 16 8. References ...................................................................................................................................... 16 9. Figures ............................................................................................................................................ 20 International Plant Protection Convention DP 9-1 DP 9 Diagnostic protocols for regulated pests 1. Pest Information The family Tephritidae comprises about 4 450 species in 500 or so genera (Norrbom et al., 1999a, 1999b; Norrbom, 2004b) (the figure was about 4 700 species in 2014 (A.L. Norrbom, personal communication, 2014)). The Tephritidae are distributed worldwide in temperate, tropical and subtropical regions. Anastrepha Schiner (Tephritidae: Toxotrypanini) is the largest genus of Tephritidae in the Americas, and is represented by more than 250 species that occur from the southern United States (Texas and Florida) to northern Argentina (Hernández-Ortiz, 1992; Foote et al., 1993; Hernández-Ortiz and Aluja, 1993; Norrbom, 2004b; Norrbom et al., 2012). At least seven species of Anastrepha are considered major economic pests because of the great importance of the cultivated fruits they attack (e.g. mango and citrus) and their wide host range. These seven species are A. fraterculus (Wiedemann); A. grandis (Macquart); A. ludens (Loew); A. obliqua (Macquart); A. serpentina (Wiedemann); A. striata Schiner; and A. suspensa (Loew). A. fraterculus (Wiedemann) has been recognized as a cryptic species complex (Hernández-Ortiz et al., 2004, 2012; Selivon et al., 2004, 2005; Vera et al., 2006, Cáceres et al., 2009). This diagnostic protocol for Anastrepha covers morphological identification of the genus and the species of major economic importance. For further general information about species of Tephritidae, see Norrbom (2010). The length of the tephritid life cycle varies according to each species as well as environmental and climatic conditions (Basso, 2003). Female Anastrepha deposit their eggs inside fruits. The number of eggs deposited per fruit is variable, and depends mainly on features of the host fruit such as size and ripeness (Malavasi et al., 1983), but each species also seems to have innate limits on the number of eggs laid (Aluja et al., 1999). Within several days, deposited eggs hatch and larvae emerge. Larvae usually feed on fruit pulp, but in some cases also or exclusively on seeds. Mature larvae usually leave the fruit to pupate in the ground, but in certain cases pupation can take place within the fruit. Adults usually emerge after a pupal period of 16–25 days, and they require a period of sexual maturation of 5–20 days after emergence. During this process the flies obtain food from homopteran secretions, bird faeces, and juice produced by ripe fruits (Prokopy and Roitberg, 1984). The relationship between Anastrepha species and their host plants is poorly understood. There are more than 330 host species from 48 families, many of them reported for a few generalist Anastrepha species (Norrbom and Kim, 1988; Norrbom, 2004a) while food plants for many other Anastrepha species remain unknown. Furthermore, current information includes numerous doubtful records, and reports of infestations induced only under laboratory conditions. Restricting the host list to natural infestations, hosts are known for about 39.8% of Anastrepha species (Hernández-Ortiz and Aluja, 1993). The introduction of cultivated exotic species such as Mangifera indica and Citrus spp. have allowed some pest species of Anastrepha to expand their original areas of distribution and enhance their reproductive potential. However, they still have marked preferences for certain native hosts, which is probably indicative of their original host relationships. In this regard, the species A. suspensa, A. fraterculus and A. striata breed mainly in hosts belonging to the family Myrtaceae, A. ludens in the Rutaceae, A. obliqua in the Anacardiaceae, A. serpentina in the Sapotaceae, and A. grandis in the Cucurbitaceae (Norrbom, 2004a). Among native hosts in the American tropics, there seems to be an ancestral association with plants that produce latex and particularly the family Sapotaceae. Sapotaceous fruits are frequent hosts for the dentata, leptozona, serpentina, daciformis, robusta and cryptostrepha species groups. Myrtaceous fruits are also very important hosts. Almost 26 Anastrepha species, most belonging to the A. fraterculus species complex, have been reported feeding on plants of this family (Norrbom and Kim, 1988; Norrbom et al., 1999c). DP 9-2 International Plant Protection Convention Diagnostic protocols for regulated pests DP 9 2. Taxonomic Information Name: Anastrepha Schiner, 1868 Synonyms: Acrotoxa Loew, 1873; Pseudodacus Hendel, 1914; Phobema Aldrich, 1925; Lucumaphila Stone, 1939 Taxonomic position: Insecta: Diptera: Tephritidae, Trypetinae, Toxotrypanini Common names: See Table 1. Table 1. Common names and synonyms of fruit fly species of major economic importance belonging to the genus Anastrepha Common name Anastrepha species Synonyms Tephritis mellea Walker, 1837 Trypeta unicolor Loew, 1862 Anthomyia frutalis Weyenbergh, 1874 Anastrepha fraterculus var. soluta Bezzi, 1909 Anastrepha fraterculus Anastrepha peruviana Townsend, 1913 South American (Wiedemann, 1830) fruit fly species complex Anastrepha braziliensis Greene, 1934 Anastrepha costarukmanii Capoor, 1954 Anastrepha scholae Capoor, 1955 Anastrepha pseudofraterculus Capoor, 1955 Anastrepha lambayecae Korytkowski and Ojeda, 1968 Anastrepha schineri Hendel, 1914 Anastrepha grandis Melon fruit fly (Macquart, 1846) Anastrepha latifasciata Hering, 1935 Anastrepha ludens Mexican fruit fly Anastrepha lathana Stone, 1942 (Loew, 1873) Anastrepha fraterculus var. mombinpraeoptans Sein, 1933 Anastrepha obliqua West Indian fruit fly Anastrepha fraterculus var. ligata Lima, 1934 (Macquart, 1835) Anastrepha trinidadensis Greene, 1934 Anastrepha serpentina Sapodilla fruit fly Urophora vittithorax Macquart, 1851 (Wiedemann, 1830)